# What is the equation of the line normal to #f(x)=6x^2 -x - 9 # at #x=1#?

##### 1 Answer

Mar 10, 2016

#### Explanation:

We can find the gradient of this function

So at

The equation of the normal line is of the form:

So the equation of the normal

The situation looks like this:

graph{(-x/11-43/11-y)(6x^2-x-9-y)=0 [-20, 20, -10, 10]}